Height: 5-7.5cm (2-3in)
Planting distance: 10-15cm (4-6in)
Soil: gritty, well-drained
Type: rock plant
Woodruff is a pretty plant for rock gardens. In early to mid summer it lookslike a green carpet covered with masses of tiny, tubular, pink flowers. (For sweet woodruff, see Galium odoratum). It is easy to care for, but must have gritty soil, and reaches a maximum height of 7.5cm (3in), with a spread of 15cm (6in).
Asperula lilaciflora subsp. Lilaciflora forms a bright green, compact carpet up to 15cm (6in) across. The flowers are pink and appear in clusters in early to mid summer. Asperula suberosa forms a compact tuft of downy, grey, covered with clusters of shell-pink flowers in early to mid summer. The plant grows up to 7.5cm (3in) high and 15cm (6in) across.
Plant from mid autumn to early spring in a sunnyin any well-drained, gritty soil.
Protect the leaves of A. suberosa from winter wet with a raised pane of glass.
Propagation: In mid to late spring, take softof non-flowering basal shoots, 2.5-4cm (1-1 1/2in) long, and in a cold frame. Grow on in an outdoor plunge bed and plant out in early to mid spring the following year.
Pests and diseases: Woodruff is generally trouble free.